package com.zenithmind.version.service.impl;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zenithmind.common.context.UserContext;
import com.zenithmind.version.mapper.BranchMapper;
import com.zenithmind.version.pojo.domain.Branch;
import com.zenithmind.version.pojo.dto.BranchCreateDTO;
import com.zenithmind.version.pojo.dto.BranchUpdateDTO;
import com.zenithmind.version.pojo.query.BranchQueryDTO;
import com.zenithmind.version.pojo.vo.BranchVO;
import com.zenithmind.version.service.BranchService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 分支服务实现类
 * 
 * @author ZenithMind Team
 * @since 2025-01-09
 */
@Slf4j
@Service
@RequiredArgsConstructor
public class BranchServiceImpl extends ServiceImpl<BranchMapper, Branch> implements BranchService {

    @Override
    @Transactional(rollbackFor = Exception.class)
    public BranchVO createBranch(BranchCreateDTO createDTO) {
        log.info("创建分支: {}", createDTO.getBranchName());
        
        // 检查分支名称是否存在
        if (checkBranchNameExists(createDTO.getRepositoryId(), createDTO.getBranchName(), null)) {
            throw new RuntimeException("分支名称已存在");
        }
        
        Branch branch = new Branch();
        BeanUtils.copyProperties(createDTO, branch);
        branch.setCreatorId(UserContext.getUserId());
        branch.setCreateTime(LocalDateTime.now());
        branch.setUpdateTime(LocalDateTime.now());
        
        save(branch);
        
        return convertToVO(branch);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean updateBranch(String id, BranchUpdateDTO updateDTO) {
        log.info("更新分支: {}", id);
        
        Branch branch = getById(id);
        if (branch == null) {
            throw new RuntimeException("分支不存在");
        }
        
        // 检查分支名称是否存在
        if (updateDTO.getBranchName() != null && 
            checkBranchNameExists(branch.getRepositoryId(), updateDTO.getBranchName(), id)) {
            throw new RuntimeException("分支名称已存在");
        }
        
        BeanUtils.copyProperties(updateDTO, branch);
        branch.setUpdateTime(LocalDateTime.now());
        
        return updateById(branch);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean deleteBranch(String id) {
        log.info("删除分支: {}", id);
        
        Branch branch = getById(id);
        if (branch == null) {
            throw new RuntimeException("分支不存在");
        }
        
        // 检查是否为默认分支
        if (Integer.valueOf(1).equals(branch.getIsDefault())) {
            throw new RuntimeException("不能删除默认分支");
        }

        // 检查是否为保护分支
        if (Integer.valueOf(1).equals(branch.getIsProtected())) {
            throw new RuntimeException("不能删除保护分支");
        }
        
        branch.setIsDeleted(1);
        branch.setUpdateTime(LocalDateTime.now());
        
        return updateById(branch);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean batchDeleteBranches(List<String> ids) {
        log.info("批量删除分支: {}", ids);
        
        for (String id : ids) {
            Branch branch = getById(id);
            if (branch != null && (Boolean.TRUE.equals(branch.getIsDefault()) || Boolean.TRUE.equals(branch.getIsProtected()))) {
                throw new RuntimeException("分支ID " + id + " 为默认分支或保护分支，无法删除");
            }
        }
        
        return removeBatchByIds(ids);
    }

    @Override
    public IPage<BranchVO> getBranchPage(BranchQueryDTO queryDTO) {
        log.info("分页查询分支");
        
        Page<BranchVO> page = queryDTO.toPage();
        
        // TODO: 实现分页查询逻辑
        return page;
    }

    @Override
    public BranchVO getBranchDetail(String id) {
        log.info("获取分支详情: {}", id);
        
        Branch branch = getById(id);
        if (branch == null) {
            throw new RuntimeException("分支不存在");
        }
        
        return convertToVO(branch);
    }

    @Override
    public List<BranchVO> getRepositoryBranches(String repositoryId, Boolean includeDeleted) {
        log.info("获取仓库分支列表: repositoryId={}, includeDeleted={}", repositoryId, includeDeleted);

        // TODO: 实现仓库分支查询
        return List.of();
    }

    @Override
    public BranchVO getBranchByName(String repositoryId, String branchName) {
        log.info("根据名称获取分支: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现根据名称查询分支
        return null;
    }

    @Override
    public BranchVO getDefaultBranch(String repositoryId) {
        log.info("获取默认分支: repositoryId={}", repositoryId);

        // TODO: 实现默认分支查询
        return null;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean setDefaultBranch(String repositoryId, String branchId) {
        log.info("设置默认分支: repositoryId={}, branchId={}", repositoryId, branchId);

        // TODO: 实现设置默认分支
        return true;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Object mergeBranch(String repositoryId, String sourceBranch, String targetBranch, String userId) {
        log.info("合并分支: repositoryId={}, sourceBranch={}, targetBranch={}", repositoryId, sourceBranch, targetBranch);

        // TODO: 实现分支合并
        return null;
    }

    @Override
    public Object checkMergeConflicts(String repositoryId, String sourceBranch, String targetBranch) {
        log.info("检查合并冲突: repositoryId={}, sourceBranch={}, targetBranch={}", repositoryId, sourceBranch, targetBranch);

        // TODO: 实现冲突检查
        return null;
    }

    @Override
    public Object compareBranches(String repositoryId, String sourceBranch, String targetBranch) {
        log.info("比较分支差异: repositoryId={}, sourceBranch={}, targetBranch={}", repositoryId, sourceBranch, targetBranch);

        // TODO: 实现分支比较
        return null;
    }

    @Override
    public List<Object> getBranchCommits(String repositoryId, String branchName, Integer limit) {
        log.info("获取分支提交历史: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现分支提交查询
        return List.of();
    }

    @Override
    public List<BranchVO> searchBranches(String repositoryId, String keyword, Integer limit) {
        log.info("搜索分支: repositoryId={}, keyword={}", repositoryId, keyword);

        // TODO: 实现分支搜索
        return List.of();
    }

    @Override
    public List<BranchVO> getUserBranches(String creatorId, String repositoryId, Integer limit) {
        log.info("获取用户创建的分支: creatorId={}, repositoryId={}", creatorId, repositoryId);

        // TODO: 实现用户分支查询
        return List.of();
    }

    @Override
    public List<BranchVO> getActiveBranches(String repositoryId, Integer limit) {
        log.info("获取活跃分支: repositoryId={}", repositoryId);

        // TODO: 实现活跃分支查询
        return List.of();
    }

    @Override
    public Object getBranchStatistics(String repositoryId) {
        log.info("获取分支统计信息: repositoryId={}", repositoryId);

        // TODO: 实现分支统计
        return null;
    }

    @Override
    public Boolean checkBranchNameExists(String repositoryId, String branchName, String excludeId) {
        log.info("检查分支名称是否存在: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现分支名称检查
        return false;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean protectBranch(String branchId, Boolean isProtected) {
        log.info("保护分支: branchId={}, isProtected={}", branchId, isProtected);

        // TODO: 实现分支保护
        return true;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Boolean archiveBranch(String branchId, Boolean isArchived) {
        log.info("归档分支: branchId={}, isArchived={}", branchId, isArchived);

        // TODO: 实现分支归档
        return true;
    }

    /**
     * 转换为VO
     */
    private BranchVO convertToVO(Branch branch) {
        BranchVO vo = new BranchVO();
        BeanUtils.copyProperties(branch, vo);
        
        // TODO: 补充其他字段转换
        
        return vo;
    }
}
